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SoSwitch Class

Group node that traverses one chosen child.

Inheritance Hierarchy

Namespace: OIV.Inventor.Nodes
Assembly: OIV.Inventor (in OIV.Inventor.dll) Version: 2024.1.1.0 (2024.1.1)
public class SoSwitch : SoGroup

The SoSwitch type exposes the following members.

Public methodSoSwitch

Creates a switch node with default settings.

Public methodSoSwitch(Int32)

Constructor that takes approximate number of children.

Public methodAddChild

Adds a child as last one in group.

(Inherited from SoGroup.)
Public methodAffectsState

Overrides method in OIV.Inventor.Nodes.SoNode to return false if there is no selected child or the selected child does not affect the state.

(Overrides SoNodeAffectsState.)
Public methodCallback
Public methodCopy
Calls Copy(false).
(Inherited from SoNode.)
Public methodCopy(Boolean)

Creates and returns an exact copy of the node.

(Inherited from SoNode.)
Public methodCopyFieldValues(SoFieldContainer)
Calls CopyFieldValues(fc, false).
(Inherited from SoFieldContainer.)
Public methodCopyFieldValues(SoFieldContainer, Boolean)

Copies the contents of fc's fields into this object's fields.

(Inherited from SoFieldContainer.)
Public methodDispose
Releases all resources used by SoDisposable.
(Inherited from SoDisposable.)
Public methodDistribute
(Inherited from SoNode.)
Public methodDoAction
Public methodEnableNotify

Notification at this Field Container is enabled (if flag == true) or disabled (if flag == false).

(Inherited from SoFieldContainer.)
Public methodEquals
Determines whether the specified Object is equal to the current Object.
(Inherited from Object.)
Public methodFieldsAreEqual

Returns true if this object's fields are exactly equal to fc's fields.

(Inherited from SoFieldContainer.)
Public methodFindChild

Finds index of given child within group.

(Inherited from SoGroup.)
Public methodGet

Returns the values of the fields of this object in the Open Inventor ASCII file format in the given string.

(Inherited from SoFieldContainer.)
Public methodGetAllFields

Returns a list of fields, including the eventIn's and eventOut's.

(Inherited from SoFieldContainer.)
Public methodGetAlternateRep

This method is called by actions to allow the node to provide an "alternate representation" when appropriate (typically depending on the action type).

(Inherited from SoNode.)
Public methodGetBoundingBox
Public methodGetChild

Returns pointer the child node with the given index.

(Inherited from SoGroup.)
Public methodGetEventIn

Returns a the eventIn with the given name.

(Inherited from SoFieldContainer.)
Public methodGetEventOut

Returns the eventOut with the given name.

(Inherited from SoFieldContainer.)
Public methodGetField

Returns a the field of this object whose name is fieldName.

(Inherited from SoFieldContainer.)
Public methodGetFieldName

Returns the name of the given field in the fieldName argument.

(Inherited from SoFieldContainer.)
Public methodGetFields

Appends references to all of this object's fields to resultList, and returns the number of fields appended.

(Inherited from SoFieldContainer.)
Public methodGetHashCode
Overrides GetHashCode().
(Inherited from SoNetBase.)
Public methodGetMatrix
Public methodGetName

Returns the name of an instance.

(Inherited from SoBase.)
Public methodGetNumChildren

Returns number of children.

(Inherited from SoGroup.)
Public methodGetPrimitiveCount
Public methodGetRenderEngineMode

Returns the supported Render engine mode.

(Inherited from SoNode.)
Public methodGetRenderUnitID
(Inherited from SoNode.)
Public methodGetStringName (Inherited from SoBase.)
Public methodGetType
Gets the Type of the current instance.
(Inherited from Object.)
Public methodGLRender
Public methodGLRenderBelowPath
(Inherited from SoNode.)
Public methodGLRenderInPath
(Inherited from SoNode.)
Public methodGLRenderOffPath
(Inherited from SoNode.)
Public methodGrabEventsCleanup
(Inherited from SoNode.)
Public methodGrabEventsSetup
(Inherited from SoNode.)
Public methodHandleEvent
Public methodHasDefaultValues

Returns true if all of the object's fields have their default values.

(Inherited from SoFieldContainer.)
Public methodInsertChild

Adds a child so that it becomes the one with the given index.

(Inherited from SoGroup.)
Public methodIsBoundingBoxIgnoring

Used by BoundingBoxAction to known if bounding box computation should be ignored or not.

(Inherited from SoGroup.)
Public methodIsNotifyEnabled

Notification is the process of telling interested objects that this object has changed.

(Inherited from SoFieldContainer.)
Public methodIsOverride

Returns the state of the override flag.

(Inherited from SoNode.)
Public methodIsSynchronizable

Gets the ScaleViz synchronizable state of this object.

(Inherited from SoBase.)
Public methodPick
Public methodRayPick
(Inherited from SoNode.)
Public methodRemoveAllChildren

Removes all children from group.

(Inherited from SoGroup.)
Public methodRemoveChild(Int32)

Removes child with given index from group.

(Inherited from SoGroup.)
Public methodRemoveChild(SoNode)

Removes first instance of given child from group.

(Inherited from SoGroup.)
Public methodReplaceChild(Int32, SoNode)

Replaces child with given index with new child.

(Inherited from SoGroup.)
Public methodReplaceChild(SoNode, SoNode)

Replaces first instance of given child with new child.

(Inherited from SoGroup.)
Public methodSearch
Public methodSet

Sets one or more fields in this object to the values specified in the given string, which should be a string in the Open Inventor file format.

(Inherited from SoFieldContainer.)
Public methodSetName (Inherited from SoBase.)
Public methodSetOverride

Turns the override flag on or off.

(Inherited from SoNode.)
Public methodSetSynchronizable

Sets this to be a ScaleViz synchronizable object.

(Inherited from SoBase.)
Public methodSetToDefaults

Sets all fields in this object to their default values.

(Inherited from SoFieldContainer.)
Public methodToString
Converts this SoBase structure to a human readable string.
(Inherited from SoBase.)
Public methodTouch

Marks an instance as modified, simulating a change to it.

(Inherited from SoNode.)
Public methodWrite
Public propertyboundingBoxIgnoring

Whether to ignore this node during bounding box traversal.

(Inherited from SoGroup.)
Public propertyIsDisposable
ISafeDisposable interface implementation.
(Inherited from SoDisposable.)
Public propertyUserData
Gets or sets the user data to be contained by the field container.
(Inherited from SoFieldContainer.)
Public propertywhichChild

Index of the child to traverse, or one of SO_SWITCH_NONE, SO_SWITCH_INHERIT, or SO_SWITCH_ALL.


This group node traverses exactly one, none or all of its children. It implements an operation similar to the switch statement in C. One can use this node to switch on and off the effects of some properties, to switch between different properties, to switch between different geometry or to control the visibility of geometry.

The OIV.Inventor.Nodes.SoSwitch.whichChild field specifies the index of the child to traverse, where the first child has index 0. There are several special values that can be used:

  • SO_SWITCH_NONE (-1, the default) means do not traverse any children.

  • SO_SWITCH_INHERIT (-2) allows the index to be inherited from a previously-encountered OIV.Inventor.Nodes.SoSwitch node or from certain other nodes (such as OIV.Inventor.Nodes.SoArray or OIV.Inventor.Nodes.SoMultipleCopy) that set the switch value.

  • SO_SWITCH_ALL (-3) traverses all children, making the switch behave exactly like a regular OIV.Inventor.Nodes.SoGroup.

There are several extended versions of this node with additional/different behavior:


  • The default value for OIV.Inventor.Nodes.SoSwitch.whichChild is SO_SWITCH_NONE, meaning that nothing is displayed by default. In most cases you will want to set some other initial value in this field.

  • When the value of OIV.Inventor.Nodes.SoSwitch.whichChild is SO_SWITCH_INHERIT, if the inherited value is larger than the number of children in the current node, the actual value used is "modulo" the number of children.

  • Some actions have an option that allows them to ignore the value of OIV.Inventor.Nodes.SoSwitch.whichChild. For example, calling setSearchingAll(true) on an OIV.Inventor.Actions.SoSearchAction causes it to traverse all the children of OIV.Inventor.Nodes.SoSwitch nodes.

  • OIV.Inventor.Nodes.SoSwitch is commonly used to control the visibility of a geometry. For example an application might allow the user to create multiple slices through a volume (OIV.VolumeViz.Nodes.SoOrthoSlice) or mesh (MoLogicalSlice) data set, but also allow the user to control the visibility of each slice separately. Using OIV.Inventor.Nodes.SoSwitch with SO_SWITCH_NONE is much more efficient than removing geometry from the scene graph because previously built caches are preserved. Using OIV.Inventor.Nodes.SoSwitch is also much more efficient than using draw style INVISIBLE (OIV.Inventor.Nodes.SoDrawStyle) because the children are not traversed.

  • This node is an OIV.Inventor.Nodes.SoGroup, not an OIV.Inventor.Nodes.SoSeparator, and therefore does not provide render caching. Generally if the children contain geometry, it is good practice to make each child an OIV.Inventor.Nodes.SoSeparator to make render caching more effective.


Switch {
whichChild -1


OIV.Inventor.Actions.SoGLRenderAction, OIV.Inventor.Actions.SoCallbackAction, OIV.Inventor.Actions.SoGetBoundingBoxAction, OIV.Inventor.Actions.SoGetMatrixAction, OIV.Inventor.Actions.SoHandleEventAction, OIV.Inventor.Actions.SoRayPickAction Traverses the chosen child or children. Sets: OIV.Inventor.Elements.SoSwitchElement

OIV.Inventor.Actions.SoSearchAction If the action's Searching-All flag is set, always traverses all children. Otherwise, traverses just the chosen child or children.

See Also